9 What is the number of oxygen atoms, in terms of the Avogadro number $$ N _ { A } $$, in one mole of carbon dioxide ($$ ( C O _ { 2 } $$)?A$$ \frac { 1 } { 3 } N _ { A } $$B$$ \frac { 2 } { 3 } N _ { A } $$C$$ N _ { A } $$D$$ 2 N...
What elements on the periodic table are gases?Gases:A gas is one of the states of matter; the others are solids, liquids, and plasma. Gases expand or compress to fill any volume. Many are odorless although hydrogen sulfide smells like rotten eggs....
解析 A核心短语/词汇:help sb./ sth. (to) do sth. 帮助某人/某物做某事句子译文:氧气是唯一的助燃气体吗? 本题考查定语从句。___helps fire burn 用来修饰之前的名词gas, 该从句的引导词在定语从句中做主语,不能省略,先行词有only 修饰时不能用which; what 不能引导定语从句,故选项A符合题意。反馈...
What is carbon's atomic number? What is the formula for an ionic compound made of carbon and oxygen? What group is argon in on the periodic table? What is the chemical symbol for calcium in the periodic table of elements? What is the periodic table used for in science?
Themodern periodic tableis very similar to Mendeleev's table, but elements today are ordered by increasingatomic number, which reflects the number ofprotonsin an atom. There aren't any "undiscovered" elements, althoughnew elementscan be created that have even higher numbers of protons. ...
Using this approach, tOET values are as great as 8000 years depending on the assumptions made about how much material is laterally advected. Assuming 'most reasonable' criteria, tOET values are roughly equal to isOET, and range from 0 to 1800 years. tOET may, in fact, effectively double...
解析 C 关系代词what在这里引导一个名词性从句作to be的表语,同时what在表语从句中又为is的表语成分,这类语法结构还有,如:Show what you have written.(把你所写的给我们看看)和She is not what she was a few years ago.(她可不是几年前的她了)。其他选项均不能表示这种语法关系。
Digital generated image of solar panel system standing on circle with grass and flowers on blue background A net-zero gainof greenhouse gases (GHG) in the atmosphere would be achieved when the level of GHG emissions released into the atmosphere is equal to the level of emissions that are remo...
Watch complete video answer for “What is the significance of oxygen cycle.” of Biology Class 12th. Get FREE solutions to all questions from chapter ECOSYSTEM.
So right on: a focus on what AI takes or replaces is indeed an “era of meh.” But that’s not the whole story. We can honor what’s lost while moving toward the new stuff we can suddenly invent and create. Welcome to the Era of MEH | Michal Malewicz ...